[zendframework/zf2#1629] Fixed failing tests due to changes in Zend\Registry
[zendframework/zf2#1629] Fixed failing tests due to changes in Zend\Registry

- Fixed all Feed, Date, Session, and Translator tests (implicit
  dependency on Locale meant tests were resetting the Registry)
- Currency had some bad behavior due to poor detection of Locale; fixed
- Removed obsolete references to Registry in a few classes

zendframework/zend-session,MadCat34/zend-session,oswaldderiemaecker/zend-session,Maks3w/zend-session